Add custom track data API

CustomTracks/CustomTrack.cs

@@ -1,6 +1,7 @@
 using System.IO;
 using BaboonAPI.Hooks.Tracks;
 using BaboonAPI.Utility;
+using JetBrains.Annotations;
 using Microsoft.FSharp.Core;
 using TrombLoader.CustomTracks.Backgrounds;
 using TrombLoader.Helpers;
@@ -36,6 +37,17 @@ public CustomTrack(string folderPath, CustomTrackData data, TrackLoader loader)
         _loader = loader;
     }
 
+    /// <summary>
+    /// Get custom data for an identifier
+    /// </summary>
+    /// <param name="identifier">Key for the data property</param>
+    /// <returns>Custom data for the specified identifier, if present on the track, otherwise null</returns>
+    [CanBeNull]
+    public ExtraData GetCustomData(Identifier identifier)
+    {
+        return _data.custom_data.TryGetValue(identifier, out var data) ? new ExtraData(identifier, data) : null;
+    }
+
     public SavedLevel LoadChart()
     {
         return _loader.LoadChartData(folderPath, _data);

CustomTracks/CustomTrackData.cs

@@ -1,6 +1,6 @@
 using System.Collections.Generic;
-using System.Linq;
 using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
 
 namespace TrombLoader.CustomTracks;
 
@@ -18,4 +18,6 @@ public class CustomTrackData
     [JsonRequired] public int difficulty;
     [JsonRequired] public float tempo;
     public string backgroundMovement = "none";
+
+    public Dictionary<Identifier, JObject> custom_data = new();
 }

CustomTracks/ExtraData.cs

@@ -0,0 +1,19 @@
+using Newtonsoft.Json.Linq;
+
+namespace TrombLoader.CustomTracks;
+
+public class ExtraData
+{
+    private Identifier _identifier;
+    private JObject _contents;
+
+    public ExtraData(Identifier identifier, JObject contents)
+    {
+        _identifier = identifier;
+        _contents = contents;
+    }
+
+    public Identifier Identifier => _identifier;
+    public JObject GetJsonObject() => _contents;
+    public JToken this[string key] => _contents[key];
+}

CustomTracks/Identifier.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Text.RegularExpressions;
+using Newtonsoft.Json;
+
+namespace TrombLoader.CustomTracks;
+
+public class Identifier
+{
+    private static readonly Regex IdentifierRegex = new(@"^([a-zA-Z_-]+):([a-zA-Z0-9_-]+)$");
+
+    public string Namespace { get; }
+    public string Path { get; }
+
+    public Identifier(string @namespace, string path)
+    {
+        Namespace = @namespace;
+        Path = path;
+    }
+
+    [JsonConstructor]
+    public Identifier(string identifier)
+    {
+        var m = IdentifierRegex.Match(identifier);
+        if (!m.Success) throw new ArgumentException("Invalid identifier string: " + identifier);
+
+        Namespace = m.Captures[0].Value;
+        Path = m.Captures[1].Value;
+    }
+
+    public override string ToString() => $"{Namespace}:{Path}";
+
+    public override int GetHashCode()
+    {
+        unchecked
+        {
+            return (Namespace.GetHashCode() * 397) ^ Path.GetHashCode();
+        }
+    }
+
+    protected bool Equals(Identifier other)
+    {
+        return Namespace == other.Namespace && Path == other.Path;
+    }
+
+    public override bool Equals(object obj)
+    {
+        if (ReferenceEquals(null, obj)) return false;
+        if (ReferenceEquals(this, obj)) return true;
+        if (obj.GetType() != this.GetType()) return false;
+        return Equals((Identifier)obj);
+    }
+
+    public static Identifier Parse(string identifier) => new(identifier);
+}